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A 8.0 ohm and a 4.0ohm resistor are connected in parallel to a 12Vbattery. (a) What is the current in in the circuit? (b) What is the voltage drop across each resistor? (c) What is the power dissipated by each resistor?
What ratio [CH3NH3+]/[CH3NH2] is needed to prepare a buffer solution with a pH of 8.60 from methylamine, CH3NH2, and methylammonium chloride, CH3NH3Cl? Kb of CH3NH2 = 3.7 10-4.
A solution containing 50.0 mL of 0.15 M C2H3COOH is titrated with 0.15 M NaOH. What is the pH of the solution after the addition of 25 mL of NaOH. pKa for C2H3COOH is 4.76.
a scientist wants to make a solution of tribasic sodium phosphate na3po4 for a laboratory experiment. how many grams
Water is ubiquitous and necessary for life on our planet. Describe the numerous unique properties of water and how it supports life. With specific applications to humans, what are the most common chemical contaminants of municipal water supplie..
For the subsequent reactions, state the balanced formula equation, complete ionic equation and net ionic equation. If no precipitate forms, write "No reaction."
1-consider the element with the electron configuration [Kr]5s2 4d10 5p3. this element is a) an alkali metal b) a representative element c) an actinide element e) a transition metal e) a noble gas
Hydrogen reacts in a fuel cell to produce water and electricity according to the reaction below. What is the maximum amount of electricity you might derive from 7.50 g of hydrogen
Find the volume and the intermolecular force present in ammonia at STP in the following reaction and What is the intermolecular force is present in NH3(g).
the quantity of cl1- in a water supply is determined bytitrating the sample with ag1. how many moles of chloride ionare
why does ch3-ch2-o-h have a higher boiling point than ch3- o-ch3 even though they have the same molar mass? use
Most top-loading balances used in this experiment measure a mass only to the nearest mg(+/- 0.001 g). This significantly affects the calculation of R in the experiment
Elemental analysis of a compound containing H, B and O gave 1.3% H and 27.5% B. The molecular weight of the compound is 157.3. What is the molecular formula of the compound. a. H3B5O6 b. H2B4O7 c. H2B5O9 d. H2B4O8
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